Singapore Airlines, the world's second-largest airline by market value, started commercial flights of the double-decker A380 last week with a Singapore-Sydney service.

"So they'll sell you a double bed and give you privacy and endless champagne and then say you can't do what comes naturally?" Tony Elwood, who travelled with wife Julie in a suite aboard the inaugural flight, told the Times of London.

"They seem to have done everything they can to make it romantic, short of bringing round oysters," Julie said. "I'd say they shouldn't really complain, should they?"